commit 1916b23b1708a69341505f8df8c66f82215fe904
author Evgenii Kliuchnikov <eustas@google.com> Mon Oct 30 14:12:53 2023 +0000
committer SkCQ <skcq-be@skia-corp.google.com.iam.gserviceaccount.com> Mon Oct 30 15:35:51 2023 +0000
tree a638710412700213ced49609a3bfd1f547c50b6e
parent fa50717f8c0633bf80ac4c0c6ba302ba7fa33933

Further harden exp2f_

When `x` is less than -127 `fbits` is guaranteed to become negative.
However, if `x` is very large negative value, then `floorf_` causes overflow.

This change adds a shortcut that prevent calculation of `floorf_` on unhealthy values.

Bug: b/308297480
Change-Id: I3cd008380ab714c21dc2b1636e699dbf3ec9d68c
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/772236
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Evgenii Kliuchnikov <eustas@google.com>